Timetable-time-format: Converted times to 24h clock and added a suffix of ':00' to each time.

Ref #151 - David and Ian decided to use times of the format '17:00'.
Timetable-time-format: Removed line from old implementation of time formatting.

Ref #151
Merge branch 'master' of http://github.com/Ian-Stewart-Binks/cscourseplanner into timetable-time-format
Timetable-time-format: Change time to 12h